On May 10, 2007, at 8:23 AM, Or Gerlitz wrote:
> A different approach which you might want to consider is to have at
> the btl level --two-- connections per <src,dst> ranks. so if A
> wants to send B it does so through the A --> B connection and if B
> wants to send A it does so through the B --> A connection. To some
> extent, this is the approach taken by IPoIB-CM (I am not enough
> into the RFC to understand the reasoning but i am quite sure this
> was the approach in the initial implementation). At first thought
> it mights seems not very elegant, but taking it into the details
> (projected on the ompi env) you might find it even nice.
What is the advantage of this approach?